INTRODUCTION | |
lwIP is a small independent implementation of the TCP/IP protocol | |
suite that has been developed by Adam Dunkels at the Computer and | |
Networks Architectures (CNA) lab at the Swedish Institute of Computer | |
Science (SICS). | |
The focus of the lwIP TCP/IP implementation is to reduce the RAM usage | |
while still having a full scale TCP. This making lwIP suitable for use | |
in embedded systems with tens of kilobytes of free RAM and room for | |
around 40 kilobytes of code ROM. | |
FEATURES | |
* IP (Internet Protocol) including packet forwarding over multiple network | |
interfaces | |
* ICMP (Internet Control Message Protocol) for network maintenance and debugging | |
* IGMP (Internet Group Management Protocol) for multicast traffic management | |
* UDP (User Datagram Protocol) including experimental UDP-lite extensions | |
* TCP (Transmission Control Protocol) with congestion control, RTT estimation | |
and fast recovery/fast retransmit | |
* Specialized raw/native API for enhanced performance | |
* Optional Berkeley-like socket API | |
* DNS (Domain names resolver) | |
* SNMP (Simple Network Management Protocol) | |
* DHCP (Dynamic Host Configuration Protocol) | |
* AUTOIP (for IPv4, conform with RFC 3927) | |
* PPP (Point-to-Point Protocol) | |
* ARP (Address Resolution Protocol) for Ethernet | |
LICENSE | |
lwIP is freely available under a BSD license. | |
DEVELOPMENT | |
lwIP has grown into an excellent TCP/IP stack for embedded devices, | |
and developers using the stack often submit bug fixes, improvements, | |
and additions to the stack to further increase its usefulness. | |
Development of lwIP is hosted on Savannah, a central point for | |
software development, maintenance and distribution. Everyone can | |
help improve lwIP by use of Savannah's interface, CVS and the | |
mailing list. A core team of developers will commit changes to the | |
CVS source tree. | |
The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and | |
contributions (such as platform ports) are in the 'contrib' module. | |
See doc/savannah.txt for details on CVS server access for users and | |
developers. | |
Last night's CVS tar ball can be downloaded from: | |
http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING] | |
The current CVS trees are web-browsable: | |
http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/ | |
http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/ | |
Submit patches and bugs via the lwIP project page: | |
http://savannah.nongnu.org/projects/lwip/ | |
DOCUMENTATION | |
The original out-dated homepage of lwIP and Adam Dunkels' papers on | |
lwIP are at the official lwIP home page: | |
http://www.sics.se/~adam/lwip/ | |
Self documentation of the source code is regularly extracted from the | |
current CVS sources and is available from this web page: | |
http://www.nongnu.org/lwip/ | |
There is now a constantly growin wiki about lwIP at | |
http://lwip.scribblewiki.com/ | |
Also, there are mailing lists you can subscribe at | |
http://savannah.nongnu.org/mail/?group=lwip | |
plus searchable archives: | |
http://lists.nongnu.org/archive/html/lwip-users/ | |
http://lists.nongnu.org/archive/html/lwip-devel/ | |
Reading Adam's papers, the files in docs/, browsing the source code | |
documentation and browsing the mailing list archives is a good way to | |
become familiar with the design of lwIP. | |
Adam Dunkels <adam@sics.se> | |
Leon Woestenberg <leon.woestenberg@gmx.net> | |